Arcee in "Deception Army" while helping Kicker find his sister takes time to blow away some Terrorcons.
Arcee: (In a tour guide voiceover tone) Good afternoon, commuters. I hope you're having a pleasant day. NOT! (Unleashes blaster fire at awaiting Terrorcons.)
Arcee: (In the tour guide voiceover tone again, to the awaiting Terrorcons) May I have your attention. As the train approaches the station, please remain behind the white line at all times and GET READY TO EAT LEAD, FREAKS!
Bulkhead and Shockblast's little skirmish in "Farewell Inferno".
Meta example: the Transformers wiki's page covering the series can be very amusing when pointing out the show's flaws.
Distribution, being a silly filler episode, gets it's fair share.
Optimus powerlinking with Omega Supreme to mop up Rodimus and Hotshot. He lands outside of the ring, ending the match before anyone can get a shot off, to the duo's relief. Optimus just sits in a corner and pouts as Omega comforts him.
The final prize of the tournament is an extra fight. Against Unicron. Only he's been scaled down to the size of a normal cybertronian. He still hurts like hell though.